Full-automatic assembly machine for simulation Christmas tree branches

Abstract

The invention relates to the technical field of manufacturing of simulation Christmas trees, and particularly discloses a full-automatic assembly machine for simulation Christmas tree branches. The four procedures of iron wire straightening and shearing, simulation leaf slitting, winding and tightening and iron wire hooking are integrated, and full-automatic production is achieved. The equipment comprises a rack as well as an iron wire conveying mechanism, a straightening mechanism, a shearing transfer mechanism, a leaf shearing mechanism, a branch and leaf clamping mechanism, a winding and binding mechanism, an arranging mechanism, a binding rope melting and fixing mechanism and a finished product hooking and throwing mechanism which are integrated on the rack. After being straightened and cut in a fixed-length mode, the iron wires are combined with automatically-cut leaves, the winding mechanism is matched with the ranking mechanism to be evenly bound, the melting and fixing mechanism fixes binding ropes at high temperature, and finally the hooking and throwing mechanism completes hooking and throwing of the ends of the iron wires. The problems of multi-device cooperation and manual intervention are solved, one-person multi-machine operation is achieved, the production efficiency is remarkably improved, the labor cost is reduced, and the method is suitable for large-scale efficient manufacturing of simulated Christmas branches.

Description

Technical Field

[0001] The present application relates to the technical field of artificial Christmas tree manufacturing, and in particular to a fully automatic artificial Christmas tree branch assembly device that integrates the functions of wire straightening and shearing, artificial leaf cutting, winding and binding, and wire bending and hooking. Background Art

[0002] The traditional production of simulated Christmas tree branches requires four independent processes: wire straightening and cutting, simulated leaf cutting, branch binding, and wire hook bending. This has the following technical defects: Decentralized processes: Four independent devices are required, which occupies a large area and has low material turnover efficiency; High dependence on manual labor: The sorting and placement of simulated leaves require manual operation throughout the process, and the branch binding process requires manual triggering of the equipment, making continuous production impossible; Low degree of automation: The equipment in each process has a single function, and one person is assigned one machine. Operators cannot manage multiple machines by themselves, resulting in low efficiency in unit labor output.

[0003] Existing technologies, such as the branch tying machine disclosed in Chinese patent CN221242477U, can automatically wind and cut leaves, but still require manual wire pre-treatment and subsequent hook bending operations, failing to solve the problem of process integration. Therefore, an integrated device that can achieve full process automation is urgently needed. Summary of the Invention

[0004] To address the issues of existing simulated Christmas tree branch assembly equipment, which suffer from fragmented processes, high labor reliance, and low efficiency, the present invention provides a highly integrated, fully automatic simulated Christmas tree branch assembly machine. This machine integrates four core processes: wire straightening and shearing, simulated leaf slitting, branch wrapping and binding, and wire hook bending. This fully automated production process, from raw materials to finished product, breaks through the traditional multi-machine collaborative model, achieving the goal of a single machine with multiple functions, allowing one person to perform multiple operations, significantly improving production efficiency and reducing labor costs. Technical Solution

[0005] The present invention integrates the following functional mechanisms through modular design, and each mechanism works together to form a continuous automated production line:

[0006] 2. Wire conveying mechanism (2): used to convey wire materials of different diameters. It is characterized by a fixed wheel (2-2) with arc grooves of different sizes and a liftable upper pressing wheel (2-3). The pressing force is adjusted by a cylinder (2-5) to adapt to wires of different diameters. A positioning rod (2-6) is provided to prevent the wires from falling out. The motor (2-4) drives the conveying. The machine plate (2-1) is used to carry the mechanism parts and is fixed to the frame (1).

[0007] 3. Wire straightening mechanism (3): Receives the wire from the conveying mechanism and straightens it. The core includes the rotation of the wire straightening frame (3-3) driven by the power module (3-5) (motor, synchronous belt, synchronous pulley). Multiple groups of straightening wheels (3-4) are installed on the frame for dynamic straightening. The position of the straightened wire is detected by the through-hole sensor (3-6). Two pedestal bearings (3-2) are fixed on the pedestal (3-1), and the pedestal is fixed on the frame.

[0008] 4. Wire shearing and transfer mechanism (4): Responsible for cutting the straightened wire to a fixed length and efficiently transferring the cut section to the subsequent workstations. Its innovation lies in: The plate frame (4-1) is installed on the frame (1); The ball screw pair (4-2) driven by the servo motor (4-9) drives the cutting knife (4-3) (pushed by the cylinder) to move along the linear guide rail (4-4) for shearing; And it is equipped with a forward transfer arm (4-5) and a reverse transfer arm (4-7) arranged in a positive and negative manner, which are respectively driven by the forward rotating cylinder (4-6) and the reverse rotating cylinder (4-8), realizing the rapid, two-way grasping and workstation conversion of the cut wire section, and sending it to the winding and ranking mechanism, greatly improving the transfer efficiency.

[0009] 5. Simulation leaf shearing mechanism (5): Used for storing and shearing simulation leaves. It includes a tray (5-7) for storing stacked simulation leaves, a leaf feeding clip (5-9) driven by a screw transmission pair (5-8) and moving above the tray, a photoelectric detection module (5-10) for detecting the position of the leaves, and a partition (5-11). The leaf feeding clip (5-9) clamps a single leaf and sends it into the shearing station composed of a fixed cutting knife (5-2) and a movable cutting knife (5-3) (driven by the cylinder (5-4)). The leaf pressing cylinder (5-6) presses the leaf tightly before shearing. The sheared leaves are shaped by shrinking through the leaf tube (5-5) for easy grasping. The bottom footstep (5-1) is fixed on the frame (1) as the mechanism platform.

[0010] 6. Simulation leaf clamping mechanism (6): A multi-degree-of-freedom (X / Y / Z directions) precision grasping manipulator. The gantry (6-2) and the Z-shaped bracket (6-6) are driven to move by the X-direction linear guide pair (6-1) and the motor (6-3), the Y-direction linear guide pair (6-4) and the motor (6-5). The Z-direction cylinder (6-9) drives the leaf clamping finger cylinder (6-10) to lift for grasping, and a special leaf pulling cylinder (6-7) and finger cylinder (6-8) are provided for possible auxiliary leaf pulling actions. This mechanism is responsible for grasping the leaves from the shearing mechanism or a specified position and accurately placing them at the winding station.

[0011] 7. Winding and Binding Mechanism (7): Its core function is to wind and bind the wire segments (branches) with the artificial leaves. It includes a winding shaft (7-2) driven by a winding motor (7-4) (through a synchronous belt). A winding arm (7-5) is installed at the front end of the shaft, which is made of plastic. A rope passing groove is provided on the outer circle of the shaft and is equipped with a rope inlet sleeve (7-3). Positioning magnets (7-6) and magnet seats (7-7) are provided on the inner and outer sides of the winding arm (7-5) to magnetically adsorb and position the perforated flange (7-8), ensuring that the wire has no relative movement when penetrating the perforated flange during winding, making it more stable.

[0012] 8. Winding and Ranking Mechanism (8): It is used to accurately position and clamp the head of the wire for the artificial leaves to be wound. There is a rectangular base (8-1), and it also includes a leaf clamping finger cylinder (8-5) installed on the slider of a linear guide pair (8-3) driven by a synchronous belt pair (8-2) driven by a servo motor (8-4). This mechanism moves and accurately positions the clamped leaves and the wire to the winding position of the winding mechanism (7), and makes a reciprocating motion to achieve the effect of precise winding and ranking. After completion, it retreats to the detection and positioning point of the sensor (8-7) and waits for the binding rope to be melted and solidified.

[0013] 9. Binding Rope Melting and Solidifying Mechanism (9): It melts and solidifies the end of the binding rope (such as nylon thread) wound around the wire branches and leaves to prevent loosening. The plate (9-1) is a load-bearing plate and is installed below the winding arm (7-5). It includes a rope clamp (9-3) driven by a cylinder (9-2) to clamp the rope head, and a high-frequency heating module (9-4) and its internal eddy current heating copper tube (9-6) to generate high temperature to instantaneously melt the rope head. A cooling fan (9-5) is provided to ensure the stable operation of the module. The high-frequency heating module also includes a water cooling system.

[0014] 10. Finished Product Hook Throwing Mechanism (10): It forms a hook at the end of the assembled and melted and solidified finished wire branches and unloads them. The large machine base (10-1) and the small machine base (10-2) are used as part installation platforms and are fixed on the frame (1). First, a connecting plate (10-10) driven by a three-axis cylinder (10-9), a rotating cylinder (10-11) and a clamping claw (10-12) on it grab the finished product and place it at the hook position. The pressing cylinder (10-7) drives the pressing plate (10-8) to position the workpiece in front of the hook. Then, a reduction motor (10-3) drives a motor gear (10-4) to drive a hook gear (10-5) and a central shaft (10-6) to rotate for hook forming. After forming, another group of three-axis cylinders (10-13) and finger cylinders (10-14) cooperate to move it out and throw it to the collection place.

[0015] Process Integration Innovation: Breaking through the traditional four-machine separate mode, through spatial optimization and layout, the processes of wire straightening and shearing, artificial leaf shearing, binding rope melting and solidifying, and finished product hook forming are integrated into a single device, reducing the equipment floor area by 80%.

[0016] Full-process automation: The operation is unmanned from wire feeding to finished product throwing. Manual intervention is only limited to exception handling and raw material clamping. One person can operate 3 - 5 devices, saving 3 - 4 operators compared to the traditional mode.

[0017] Intelligent adaptive production: Equipped with multiple sensing and PLC control modules, it can automatically identify the material state and adjust process parameters according to the touch screen parameters, supporting flexible production of multiple specifications of tree branches. Description of the Drawings

[0018] Figure 1-11 Successively show the overall structure of the device and the details of each module, where Figure 11 is a schematic diagram of the integrated layout, clearly presenting the spatial distribution and cooperation relationship of each functional mechanism.

[0019] Figure 1 is the frame structure diagram of a full-automatic assembly machine for artificial Christmas tree branches of the present invention Figure 2 is the structure diagram of the iron wire conveying mechanism of a full-automatic assembly machine for artificial Christmas tree branches of the present invention Figure 3 is the structure diagram of the iron wire straightening mechanism of a full-automatic assembly machine for artificial Christmas tree branches of the present invention Figure 4 is the structure diagram of the iron wire shearing and transfer mechanism of a full-automatic assembly machine for artificial Christmas tree branches of the present invention Figure 5 is the structure diagram of the artificial leaf shearing mechanism of a full-automatic assembly machine for artificial Christmas tree branches of the present invention Figure 6 is the structure diagram of the artificial leaf clamping mechanism of a full-automatic assembly machine for artificial Christmas tree branches of the present invention Figure 7 is the structure diagram of the winding and tying mechanism of a full-automatic assembly machine for artificial Christmas tree branches of the present invention Figure 8 is the structure diagram of the winding and ranking mechanism of a full-automatic assembly machine for artificial Christmas tree branches of the present invention Figure 9 is the structure diagram of the binding rope melting and solidifying mechanism of a full-automatic assembly machine for artificial Christmas tree branches of the present invention Figure 10 is the structure diagram of the finished product hook throwing mechanism of a full-automatic assembly machine for artificial Christmas tree branches of the present invention Figure 11 is the overall structure diagram of a full-automatic assembly machine for artificial Christmas tree branches of the present invention Figure 11Middle: 1. Frame; 2. Wire conveying mechanism; 3. Wire straightening mechanism; 4. Wire shearing and transfer mechanism; 5. Simulated leaf shearing mechanism; 6. Simulated leaf clamping mechanism; 7. Branch winding and binding mechanism; 8. Winding and ranking mechanism; 9. Binding rope melting mechanism; 10. Finished product bending hook throwing mechanism. Example

[0020] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. The fully automatic assembly machine for artificial Christmas tree branches in this embodiment realizes four-step integrated operation through modular design, and each mechanism operates in coordination to form a continuous automated production process.

[0021] like Figure 11 As shown, this embodiment includes a frame (1) and ten groups of functional mechanisms integrated thereon, and the equipment operation process is as follows: The iron wire is introduced into the straightening mechanism (3) through the conveying mechanism (2) for straightening; After straightening, the iron wire enters the shear transfer mechanism (4) to be cut to a fixed length and transferred to the winding arrangement mechanism (8) and sent to the winding station; At the same time, the simulated leaf shearing mechanism (5) cuts the leaves to a fixed length and then the leaves are accurately positioned by the clamping mechanism (6) to the winding station to wait for the rope to be tied; The winding and tightening mechanism (7) and the winding and positioning mechanism (8) cooperate to complete the binding of the iron wire and the simulated leaves; After the rope is tied, the rope-tightening mechanism (9) performs heat-tightening treatment on the rope head to prevent the rope from loosening; After the binding rope is melted and solidified, the finished product is grabbed from the winding and ranking mechanism (8) by the hook throwing mechanism (10) and thrown to one side after the hook is bent.

[0022] The above actions are repeated in a cycle.

[0023] The multi-groove pressing wheel group (2-2 / 2-3) is configured to realize flexible clamping and conveying of 2-5mm diameter iron wire through the cylinder (2-5); The encoder integrated reducer servo motor (2-4) accurately controls the wire feeding length with an error of ≤±0.5mm; During the wire threading stage, the upper pressing wheel (2-3) can be raised 15mm for easier operation.

[0024] The double bearing seat (3-1) and the double bearing (3-2) support the straightening module (3-3), and two sets of staggered straightening wheels (3-4) form an S-shaped straightening channel; The power module (3-5) drives the straightening module to rotate at high speed to eliminate the internal stress of the material and straighten the wire; The through-hole sensor (3-6) monitors the wire in-place signal in real time and triggers the PLC to measure the length.

[0025] The cutting tool (4-3) is driven by a ball screw (4-2) for fixed-length shearing, and the servo positioning accuracy reaches 0.01 mm; The forward / reverse transfer arms (4-5 / 4-7) are equipped with permanent magnet suction heads to realize the 180° station conversion of the wire after shearing to the winding and ranking position; The linear guide rail (4-4) ensures the accuracy of the cutting tool's movement trajectory and high shearing efficiency.

[0026] The blade partition (5-11) realizes the classified storage of different numbers of simulated leaf clusters, and the capacity of simulated leaves is 2-5 branches; The pneumatic leaf feeding clamp (5-9) cooperates with the lead screw transmission pair (5-8) to complete the precise transmission of ±0.2 mm; The infrared detection module (5-10) monitors the remaining length of the simulated leaves in real time and automatically alarms in case of material shortage.

[0027] The three-axis linkage system (6-3 / 6-9 / 6-5) realizes the XYZ three-dimensional space positioning, and the repeat accuracy is ±0.1 mm; The elastic jaws (6-8 / 6-10) adopt a silica gel coating design to prevent damage to the simulated leaves; The gantry frame (6-2) moves quickly in the XY direction, improving the picking and placing efficiency of the simulated leaves.

[0028] The hollow winding shaft (7-2) is internally provided with a wire guiding groove to realize the non-twisted transmission of the binding rope; The double magnetic pole positioning device (7-6) ensures that the perforated flange (7-8) does not rotate radially during winding; The servo motor (7-4) drives the winding arm (7-5) to realize stepless speed regulation from 0 to 3000 rpm.

[0029] The leaf clamping finger cylinder (8-5) clamps the head of the wire. With the cooperation of the synchronous belt pair (8-2) and the linear guide rail (8-3), it is driven by the servo motor (8-4) to move reciprocally, realizing axial precise ranking; The pneumatic clamping fingers (8-5) have adjustable air pressure, and the clamping force can be adjusted in the range of 2-10 N; The sensor (8-7) detects the position of the wire in real time and feeds back to the control system.

[0030] The high-frequency eddy current heating module (9-4) can heat up to 300 °C within 0.5 s; The copper tube heating element (9-,6) cooperates with the water cooling system, and the temperature control accuracy is ±3 °C; The double cylinders (9-2) drive the rope clamp (9-3) to prevent the head of the rope from coming out and facilitate recycling.

[0031] The three-axis cylinder 10-9 retracts, and the rotary cylinder 10-11 drives the material clamping claw 10-12 to pick up the tied branches from the winding and ranking position. When retracting, the head of the wire just gets stuck at the hook gear 10-5; The blanking cylinder 10-7 drives the blanking plate 10-8 to press down, position the iron wire, then the central shaft 10-6 ejects, clamps the iron wire, and the blanking plate rises; The reduction motor 10-3 rotates, and the motor gear 10-4 drives the hook gear 10-5 to rotate 90-270° and then retracts to complete the hooking; The finger cylinder 10-14 clamps the branch, the clamping jaw loosens, the three-axis cylinder 10-13 quickly ejects, and the finger cylinder 10-14 loosens to complete the throwing of the material; The self-centering blanking plate (10-8) adopts a V-shaped positioning groove to adapt to finished products of different diameters.

[0032] In this embodiment, through modular integration and intelligent control, the full-process automated production from raw materials to finished products is realized. A single machine can replace the functions of four traditional devices, significantly reducing the dependence on labor. Those skilled in the art can make adaptive adjustments under the principle of the present invention, and such variations are within the protection scope of the present invention.

Claims

1. An automatic assembly machine for artificial Christmas tree branches, characterized in that, Comprising: A frame (1); A wire conveying mechanism (2), installed on the frame, including a fixed wheel (2-2) with arc grooves of different sizes, a liftable upper pressing wheel (2-3), a cylinder (2-5) for driving the upper pressing wheel, a positioning rod (2-6), and a motor (2-4) for driving the conveying; A wire straightening mechanism (3), including a power module (3-5), a wire straightening frame (3-3) driven by the power module, multiple groups of straightening wheels (3-4) installed on the straightening frame, and a through-hole sensor (3-6) for detecting the position of the wire; A wire shearing and transfer mechanism (4), including a ball screw pair (4-2) driven by a servo motor (4-9), a cutter (4-3) driven by the ball screw pair, a cylinder for pushing the cutter, a linear guide rail (4-4), a forward transfer arm (4-5), a reverse transfer arm (4-7), a forward rotating cylinder (4-6) for driving the forward transfer arm, and a reverse rotating cylinder (4-8) for driving the reverse transfer arm; A simulated leaf shearing mechanism (5), including a tray (5-7) for storing simulated leaves, a leaf feeding clip (5-9) driven by a lead screw transmission pair (5-8), a photoelectric detection module (5-10), a fixed cutter (5-2), a movable cutter (5-3), a cylinder (5-4) for driving the movable cutter, and a leaf pressing cylinder (5-6); A simulated leaf clamping mechanism (6), including X / Y / Z-direction linear guide rail pairs (6-1, 6-4), motors (6-3, 6-5) for driving the guide rails, a Z-direction cylinder (6-9), a leaf clamping finger cylinder (6-10), a leaf pulling cylinder (6-7), and an auxiliary finger cylinder (6-8); A winding and tying branch mechanism (7), including a winding shaft (7-2) driven by a winding motor (7-4), a winding arm (7-5), a positioning magnet (7-6), a magnet seat (7-7), and a perforated flange (7-8) for inserting and fixing the wire; A winding and ranking mechanism (8), including a synchronous belt pair (8-2) driven by a servo motor (8-4), a linear guide rail pair (8-3), a leaf clamping finger cylinder (8-5) installed on the guide rail slider, and a positioning sensor (8-7); A binding rope melting and fixing mechanism (9), including a rope clamp (9-3) driven by a cylinder (9-2), a high-frequency heating module (9-4), an eddy current heating copper tube (9-6), and a cooling fan (9-5); A finished product hook throwing mechanism (10), including a gear set (10-4, 10-5) driven by a reduction motor (10-3), a central shaft (10-6), a pressing cylinder (10-7), a pressing plate (10-8), multiple groups of three-axis cylinders (10-9, 10-13), a rotating cylinder (10-11), and clamping claws (10-12, 10-14).

2. The device according to claim 1, wherein: The arc grooves of the fixed wheel (2-2) and the upper pressing wheel (2-3) of the wire conveying mechanism (2) correspond to wires of different diameters, and the positioning rod (2-6) is arranged on the feeding side.

3. The device according to claim 1, wherein: The forward transfer arm (4-5) and the reverse transfer arm (4-7) of the wire shearing transfer mechanism (4) are symmetrically distributed at 180°.

4. The device according to claim 1, characterized in that: The high-frequency heating module (9-4) of the binding rope melting mechanism (9) is integrated with a water cooling system.

5. The device according to claim 1, characterized in that: The leaf pulling cylinder (6-7) and the auxiliary finger cylinder (6-8) of the simulated leaf clamping mechanism (6) move in linkage.

6. The device according to claim 1, characterized in that: The hook bending action of the finished product hook throwing mechanism (10) is completed by the gear set (10-4, 10-5) meshing and driving the central shaft (10-6) to rotate.

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